Ok - this one is a stretch, but the made up band, Steel Dragon, from the not-a-particularly-great-movie "Rock Star" was actually pretty killer - listen to the sound track.
The actual performers are Zakk Wylde (guitarist for Ozzy, Black Label Society) , Jeff Pilson (Bassist for Dokken) Jason Bonham (drummer, son of John Bonham of Zeppelin), and Mike Matijevic (Steelheart)
This is video is a 'live' version with an extra singer, but this version os "Stand UP and Shout" still rocks pretty hard:
And, since I brought up underappreciated ficititious bands...I have to include Spinal Tap - the original band to go to eleven...here with "Hell Hole"